Re: Lip wrinkles
Coverage may not be the best or immediate method to use to target wrinkles as trying to merely cover them up will result in defining them more.
Laura's right about using treatments, those will help target the issue and help to soften and improve the appearance and condition of lines so they're not as defined and whatever product you layer on top will less likely emphasize those areas.
In addition to the wonderful products already present, Kate Somerville's Dermal Quench treatment is a wonderful multi-use tool that delivers hyaluronic acid (a humectant that binds 1000 times its weight in healthy moisture drawn from the atmosphere) through an oxygenating system for quicker absorption and to help boost the effectiveness of whatever products you layer on top (be it serums or moisturizers). The DQ can be used all over the face, not just on lips, and even on eyes.
A little goes a long way, normally spraying 3 lines (one down each cheekbone and one on the forehead), rub in the foam dispensed all over face, even down to the neck. If need be, mist a bit onto fingers and pat on lips and around lips (same with the eyes and lids).
You can always follow up with one of the treatments/products Laura mentioned below (again, freshly oxygenated skin will accept and process those active ingredients better and more efficiently). You can then follow up with a lip primer or thicker lip balm to "fill in" those lines and prevent lip products from feathering or bleeding. MUFE, Urban Decay, and Too Faced maked clear lip liners with waxy textures, great to build a barrier on lips. UD and TF also make cushioning lip primers, and try a slightly thicker balm like ones from Jack Black or Anthony Logistics (includes Resverotrol, an anti-oxidant rich ingredient that boosts anti-aging properties).
Re: Lip wrinkles
Hi Packster, If you are looking for products that will help minimize the appearance of fine lines, wrinkles around the lips, I recommend these:
Peter Thomas Roth Un-Wrinkle® Lip Treatment
Caudalie Pulpe Vitaminée Eye and Lip Cream
Shiseido Future Solution LX Eye and Lip Contour Regenerating Cream
Clinique All About Lips